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Valid Exam Salesforce JS-Dev-101 Practice | New JS-Dev-101 Test Pattern

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Salesforce JS-Dev-101 Exam Syllabus Topics:

Topic
Details

Topic 1

Server Side JavaScript: Covers Node.js implementations, CLI commands, core modules, and package management solutions for given scenarios.

Topic 2

Asynchronous Programming: Covers asynchronous programming concepts and understanding how the event loop controls execution flow and determines outcomes.

Topic 3

Variables, Types, and Collections: Covers declaring and initializing variables, working with strings, numbers, dates, arrays, and JSON, along with understanding type coercion and truthy
falsy evaluations.

Topic 4

Debugging and Error Handling: Covers proper error handling techniques and the use of the console and breakpoints to debug code.

Topic 5

Testing: Covers evaluating unit test effectiveness against a block of code and modifying tests to improve their coverage and reliability.

>> Valid Exam Salesforce JS-Dev-101 Practice <<

New JS-Dev-101 Test Pattern & JS-Dev-101 Top Questions

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Salesforce Certified JavaScript Developer - Multiple Choice Sample Questions (Q12-Q17):

NEW QUESTION # 12
What are two unique features of functions defined with a fat arrow as compared to normal function definition?
Choose 2 answers

A. The function uses the this from the enclosing scope.
B. The function generated its own this making it useful for separating the function's scope from its enclosing scope.
C. The function receives an argument that is always in scope, called parentThis, which is the enclosing lexical scope. C. If the function has a single expression in the function body, the expression will be evaluated and implicit returned.

Answer: B,C

NEW QUESTION # 13
refer to the exhibit.

Which code change should be done for the console to log the following when 'Click me!' is clicked' > Row log > Table log

A. Change line 10 to event.stopPropagation (false) ;
B. Remove lines 13 and14
C. Remove line 10
D. Change line 14 to elem.addEventListener ('click', printMessage, true);

Answer: C

NEW QUESTION # 14
Which two implementations of utils.js support foo and bar?

A. import {foo} from "./helpers/utils.js";
export {foo, bar};
B. const foo = () => { return 'foo'; }
const bar = () => { return 'bar'; }
export default {foo, bar};
C. export default class {
foo() { return 'foo'; }
bar() { return 'bar'; }
D. const foo = () => { return 'foo'; }
const bar = () => { return 'bar'; }
export {foo, bar};

Answer: C,D

Explanation:
}

NEW QUESTION # 15
A developer initiates a server with the file server.js and adds dependencies in the source code's package.json that are required to run the server.
Which command should the developer run to start the server locally?

A. npm start
B. start server.js
C. node start
D. npm start server.js

Answer: A

Explanation:
Comprehensive and Detailed Explanation From JavaScript/Node.js Knowledge:
In a Node.js project that uses package.json, you typically define a "start" script:
{
"scripts": {
"start": "node server.js"
}
}
Then you start the app with:
npm start
npm start:
Looks up the "start" script in package.json.
Runs the command defined there (commonly node server.js).
This is the standard way to start a Node.js app with npm-managed dependencies.
Why others are incorrect:
A . node start
Tries to run a file named start with Node; does not use package.json scripts.
C . npm start server.js
npm start does not take the script filename as an argument in this way; it just runs the start script as defined.
D . start server.js
Not an npm or node command; on some shells it just tries to "start" a process but is not the standard Node/npm workflow.
Relevant concepts: package.json, npm scripts, npm start, Node entry file execution.
________________________________________

NEW QUESTION # 16
A developer is leading the creation of a new web server for their team that will fulfill API requests from an existing client.
The team wants a web server that runs on Node.Js, and they want to use the new web framework Minimalist.Js. The lead developer wants to advocate for a more seasoned back-end framework that already has a community around it.
Which two frameworks could the lead developer advocate for?
Choose 2 answers

A. Angular
B. Koa
C. Gatsby
D. Express

Answer: A,C

NEW QUESTION # 17
......

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Matt Young Matt Young

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